21112122021222 has 16 divisors (see below), whose sum is σ = 42224325885360. Its totient is φ = 7037360366592.

The previous prime is 21112122021217. The next prime is 21112122021247. The reversal of 21112122021222 is 22212022121112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244654 + ... + 6502622.

It is an arithmetic number, because the mean of its divisors is an integer number (2639020367835).

Almost surely, 2^{21112122021222} is an apocalyptic number.

21112122021222 is an abundant number, since it is smaller than the sum of its proper divisors (21112203864138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21112122021222 is a wasteful number, since it uses less digits than its factorization.

21112122021222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6820247.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 21112122021222 its reverse (22212022121112), we get a palindrome (43324144142334).

The spelling of 21112122021222 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty-two million, twenty-one thousand, two hundred twenty-two".